<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>群组选择器和后代选择器</title>
    <style>
        div, p, h1{
            background-color: yellow;
        }
        div p{
            color: red;
        }
    </style>
</head>
<body>
    <!-- 群组选择器 -->
    <div>1111111111111111</div>
    <p>11111111111111111111</p>
    <h1>1111111111111111111</h1>
    <!-- 后代选择器 -->
     <div>
        2222222222222
        <p>333333333333333</p>
     </div>
</body>
</html>